SINGAPORE (July 9): As soon as you are diagnosed as diabetic, ads for treatments show up on social feeds. You get alerts on health supplements, maybe nutrition tips. Prompts on insurance policies pop up on your phone.

That is not a scene from Minority Report. It is a manifestation of the trove of data harnessed by WeDoctor, one of China’s most richly valued online health outfits, in an ambitious quest to upend the business of personal care. The ads may not be conspicuous — they can be buried within a pitch about chronic diseases — but the target is uncannily precise: you.

Backed by Tencent Holdings, WeDoctor joins a growing contingent of tech giants hoping to revolutionise an industry seemingly impervious to online disruption. While the likes of Google seek to unlock the secrets of immortality or unravel medical mysteries, WeDoctor is focusing on something more pragmatic: making money by unclogging bottlenecks in a Chinese healthcare market slated to hit RMB8 trillion ($1.64 trillion) by 2020.

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